this is the first day of the federal government's new fiscal year. but there's not much to celebrate because the nation is headed toward what's being called the fiscal cliff and there are dire new warnings today about what will happen to american families unless congress and the president reach a budget deal by december 31. that is the day that a series of tax cuts will expire and big cuts in federal spend will take hold. tax experts said today 90% of american families are facing what they call unprecedented tax increases. how much? wyatt andrews is in washington tonight. wyat >> reporter: scott, according to the non-partisan tax policy center, the united states is now on the threshold of one of the largest tax increases in history-- a tax hike that could average $3,500 for every american household. without action by congress, the report says, taxes will go up next year by 20%-- $536 billion overall and will hit americans at every income level, including those living below the poverty line. for a middle-income family making $40,000 a year, taxes will go up by $2,000. the increases are so lar